# GENERAL PHYSICS 1 - 12 - Q2 - DW4

```General Physics 1
12
Name: _____________________________________ Grade &amp; Section: __________________________
Date: __________________
Parent Signature: _____________________
Score:
Quarter: 2 Week: 2 Day: 1
Title of the Activity: Falling for Gravity
Activity no: 1
Learning Competencies:
Use Newton’s law of gravitation to infer gravitational force, weight, and acceleration due to
gravity. Determine the net gravitational force on a mass given a system of point masses.
Discuss the physical significance of gravitational field (STEM_GP12G-IIb-16-18)
Direction:
Write down every quantity each problem gives you and which quantity you are trying to
find. Find the equation to relate these quantities and show your complete solution. Use
additional sheets of paper if necessary.
Materials:
Worksheet
pen scientific calculator
Activity:
1. Lee Yeong gazed out of the window and saw the full moon rose with more than ordinary
splendor. (A) What force does a full moon exert on Lee Yeong with a mass of 65 kg when it
is directly overhead with its center 378,000 km away. (B) Compare this force with the force
exerted on Lee Yeong by the earth.
G = 6.67 x 10-11 Nm2/kg2
(A) Given Quantities
(B) Given Quantities
(A) Unknow Quantity
(B) Unknown Quantity
(A) Equation
(B) Equation
(A) Solution (use additional sheets of paper
(B) Solution (use additional sheets of paper
if necessary)
necessary)
if
General Physics 1
12
2. The mass of planet Mars is 10.7% that of the earth, and its radius is 53.3% that of the
earth. (A) Compute the acceleration due to gravity on the surface of Mars from these data.
(B) If a rock weighs 75.0N on earth, what would it weigh at the surface of Mars? G = 6.67 x
10-11 Nm2/kg2
(A) Given Quantities
(B) Given Quantities
(A) Unknown Quantity
(B) Unknown Quantity
(A) Equation
(B) Equation
(A) Solution (use additional sheets of paper
if
(B) Solution (use additional sheets of paper
necessary)
necessary)
if
3. Calculate the earth’s gravity force on Ally a 55-kg astronaut who is repairing the Hubble
space telescope 600 km above the earth’s surface, and then compare this value with her
weight at the earth’s surface. G = 6.67 x 10-11 Nm2/kg2
(A) Given Quantities
(B) Given Quantities
(A) Unknown Quantity
(B) Unknown Quantity
(A) Equation
(B) Equation
(A) Solution (use additional sheets of paper
if
(B) Solution (use additional sheets of paper
necessary)
necessary)
if
General Physics 1
12
Name: _____________________________________ Grade &amp; Section: __________________________
Date: __________________
Parent Signature: _____________________
Score:
Quarter: 1 Week: 2 Day: 2
Title of the Activity: My Love from the Star
Activity no: 2
Learning Competencies:
Use Newton’s law of gravitation to infer gravitational force, weight, and acceleration due to
gravity. Determine the net gravitational force on a mass given a system of point masses.
Discuss the physical significance of gravitational field (STEM_GP12G-IIb-16-18).
Direction:
Write down every quantity each problem gives you and which quantity you are trying to
find. Find the equation to relate these quantities and show your complete solution. Use
additional sheets of paper if necessary.
Materials:
Worksheet
pen scientific calculator
Activity
Many stars belong to systems of two or more stars held together by their mutual
gravitational attraction. Figure 1 shows a three-star system at an instant when the stars
are at the vertices of a 450 right triangle. Find the total gravitational force exerted on the
small star by the two large ones.
y
2.00 X 1020
m
1.80 X 1030 kg
2.00 X 1020m
m
(A) Given Quantities
5.00 X 10
30
kg
(B) Given Quantities
g
(A) Unknown Quantity
(B) Unknown Quantity
(A) Equation
(B) Equation
(A) Solution (use additional sheets of paper
necessary)
if
(B) Solution (use additional sheets of paper
necessary)
if
General Physics 1
12
Name: _____________________________________ Grade &amp; Section: __________________________
Date: __________________
Parent Signature: _____________________
Score:
Quarter: 1 Week: 2 Day: 3
Title of the Activity: Tidal Power
Activity no: 3
Learning Competencies:
Use Newton’s law of gravitation to infer gravitational force, weight, and acceleration due to
gravity. Determine the net gravitational force on a mass given a system of point masses.
Discuss the physical significance of gravitational field (STEM_GP12G-IIb-16-18).
Direction:
Newton’s gravity makes a lot of things easy to explain like tides. It is the moon’s gravity that
pulls the seawater and causes high tides on the side of the earth facing the moon and low
tide on the other side facing away from it. By turning to ocean tides we can find a source of
energy that will not deplete our existing non-renewable resources.
Let us say that you were a project engineer of an energy company sent to a barangay which
is a potential tidal energy site. Your task is to create a poster describing how the energy of
ocean tides work as well as the positive effects of tidal power. How will your poster look
like? Create your poster using a separate sheet of paper
Materials:
Worksheet
pencil art materials (colored pens, crayons etc)
Activity:
How will your poster look like? Create your poster using the box below:
```